Just wanted to know if there is a solution to my problem. Two weeks after adding two gold fish in the FT, there is still nitrites... A spike of nitrites is still here. Is there a link with the pH? It's around 7,8... And it's not going down... Nitrates are approximately 40 mg/L and Ammoniac around 0,1 mg/L. What can I do? Change water? Add something to my system?

I got 3 strawberry plants, and lettuce. I can see necrosis on the leaves of strawberry plants.

Two weeks doesn't sound like a long enough time for you to have a fully cycled system, but I have heard of systems cycling in one week so I don't know what all the factors are that control the length of time. But since you already have a concentration of 40 mg/L of Nitrate, it seems you are pretty much on the right track.

I would consider adding some more media to add more surface area for the bacteria as well as another plant, maybe something that has fast growth like arugula or basil.

A water change has always worked for me but you don't want to lose to much of those nutrient you have already built up over the past few weeks. Maybe a 20% water change or less will help lower the Nitrites a bit. What is your Nitrite concentration anyway?

In my systems I have always had a lot of necrosis at the begin. My plants don't really start doing well until a few months after my systems have been established.

It sounds like your system is partially cycled, the bacteria just need to build up a bit more. The nitrites should disappear once that happens (probably in a few days to a week but could be a couple of weeks).

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